Type of Publication
Year of Publication
1993
Authors

W. Zhong; Y. Cai; D. Tomanek

Abstract

IT has been long known that hydrogen can substantially reduce the mechanical stability of transition metals under tensile stress1-3. This phenomenon of 'hydrogen embrittlement' has important consequences for the safety of fusion reactors and for space technology; but there remains considerable uncertainty about its microscopic origin2,3. Here we report the results of a study of fracture of hydrogen-loaded palladium under tensile stress which uses Parrinello-Rahman molecular dynamics based on a many-body alloy hamiltonian. A rather unexpected result is that the apparent hydrogen embrittlement results from a local enhancement of ductility in hydrogen-saturated regions of the metal which causes a reduction of the critical tensile stress at which failure occurs.

DOI

10.1038/362435a0

Volume

362

Notes

Times Cited: 29 Tomanek, David/B-3275-2009 Tomanek, David/0000-0003-1131-4788 30

Pagination

435-437

Number
6419
ISSN Number

0028-0836